Overview #

A Cross-site Scripting (XSS) vulnerability exists in HTMLy CMS. The vulnerability allows remote attackers to inject arbitrary web script or HTML.

Vulnerability Details #

Affected Versions: All versions before patch

Root Cause: Insufficient input validation and output encoding allows attackers to inject malicious scripts.

Exploitation Requirements #

• No authentication required
• Victim must visit a crafted URL or page

Impact #

Remote attackers can exploit this vulnerability to:

• Steal admin session cookies
• Compromise the CMS installation
• Perform actions on behalf of users

Proof of Concept #

Details available upon request.

Solution #

Upgrade to a patched version of HTMLy that includes proper input sanitization.

References #

• Vendor notification sent